Court documents showed Mr Brough, who has been preselected as the Liberal National Party candidate in Mr Slipper's seat, exchanged emails and texts with James Ashby before he filed the claim against his then boss Mr Slipper.

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In his first interview on the subject, published on ABC Online on Thursday, Mr Brough says his involvement in the matter has been fully canvassed and there's nothing more to add.

"All of the discussion, the text messages - of which there is about half a dozen at most - are all there for anyone to read. I have nothing to be ashamed of or would change," he says.

He says the total of his involvement was telling Mr Ashby to see a lawyer and police.

"A person (James Ashby) came to me for assistance. I suggested that they go and get legal advice. I suggested they go to police if they believed a crime had been committed."

Mr Brough said he was not party to the court action and was not being judged by Justice Rares' findings.

He would not comment further when asked if it was wrong or illegal to see Mr Slipper's diary.

"Mr Slipper's now about to face court next week and be charged ... on criminal offences relating to allegations of misuse of travel (entitlements)," Mr Brough said.

"I think that's the right and proper place for such matters to be decided, so it would be entirely wrong of me to make any comment whatsoever about such issues."

James Ashby and his lawyer Michael Harmer have both lodged applications for leave to appeal the court ruling.

Mr Brough later said he had yet to cross paths with Mr Slipper since moving into an office metres from the former speaker's office in Buddina in the Fisher electorate.

"I have been coming and going for three weeks and I have not seen him," Mr Brough told AAP on Thursday.